| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 09/25/2009 | 0945 | 10/03/2009 | 1200 | Suspect |
| Subject: | GRW/WACR/M1 - Interference/False signal |
| DataStreams: | grwwacrspeccmaskcopolM1.a0, grwwacrM1.b1, grwwacrspeccmaskxpolM1.a0 |
| Description: | Interference occurred between the WACR/SWACR beginning 9:45 GMT on 09/25. This effect was not as noticeable on DQ plots until ~10 GMT on 09/27 at which time the interference was quite pronounced as vertical bands in the reflectivity and velocity plots. The interference was slightly noticeable in the spectral width plots as well. Interference resulted from the SWACR using the same frequency as the WACR. Interference was alleviated by changing the pulse repetition frequency (prf) from 10 kHz to 9.9 kHz. Some minor contamination still existed during the presence of highly reflective clouds/precipitation. The Doppler velocity was not affected as much by the interference. A cloud mask based on the Doppler velocity will remove most of this contamination in the reflectivity and spectra width measurements. |
| Suggestions: | |
| Measurements: | grwwacrspeccmaskcopolM1.a0: more
grwwacrspeccmaskxpolM1.a0: more grwwacrM1.b1: more |